What size beds are there at UC Santa Cruz? Specifically porter college.?

So I got a packet in the mail saying that regular sheets won't fit their beds. It also came with a booklet that showed different value packs to order from. I was thinking of taking my own sheets and linen but now I'm worried because i have a twin bed and i'm not sure if it's gonna fit. So if anyone knows the exact size of their beds it'd be really helpful. Thanks